Synthesis of 2-(Trifluoromethyl)indoles via Domino Trifluoromethylation/Cyclization of 2-Alkynylanilines
作者:Yibin Ye、Kelvin Pak Shing Cheung、Lisi He、Gavin Chit Tsui
DOI:10.1021/acs.orglett.8b00509
日期:2018.3.16
A new method for the synthesis of 2-(trifluoromethyl)indoles using easily accessible 2-alkynylanilines and a well-established fluoroform-derived CuCF3 reagent is described. This method utilizes a domino trifluoromethylation/cyclization strategy to construct the indole cores with no ambiguity of the CF3 position. The intriguing 3-formyl-2-(trifluoromethyl)indoles can also be synthesized by this protocol
描述了一种使用容易获得的2-炔基苯胺和一种行之有效的源自氟仿的CuCF 3试剂合成2-(三氟甲基)吲哚的新方法。该方法利用多米诺三氟甲基化/环化策略来构建吲哚核,而CF 3位置没有歧义。有趣的3-甲酰基-2-(三氟甲基)吲哚也可以通过该方案合成,它们是制备三氟甲基化药物类似物的有用中间体。最终的CF 3来源是廉价的工业副产品氟仿。